I would tell you that you have a very naive, limited, and western point of view of the world. When you buy and consume Marijuana you are supporting an industry of organized crime and death.

If that's your rationale, then I can only assume that you've never purchased gasoline before, or used any mode of gasoline-powered transportation. Not to mention bananas, or coffee, or pretty much anything sold at Wal*Mart. Unless you're a complete hypocrite, that is.